Through the action of intraflagella transport, primary cilia are found to sequester Jouberin, a positive regulator of Wnt signalling, to limit β-catenin nuclear entry and to modulate Wnt responsiveness. Consequently, Wnt is exacerbated in cells without cilia but inhibited in cells with more than one cilium.
- Madeline A. Lancaster
- Jana Schroth
- Joseph G. Gleeson